Elevator



July 10, 1923.

T. c; CRAIG ELEVATOR 1920 4 Sheets-Sheet 2 Filed Aug. 24

v INVENToR.

'v Ty ATTORNEY.

.my w, 1923, Hamm .T. C.' CRAIG ELEVATOR Filed Aug. 24. 19a-o 4 sheets-sheet [ll Il! lll l Illllil] .lll

I N VEN TOR.

Patented July l0, 1923.

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iidtihtdi l THOMAS C. CRAIG, 0F WATERBURY, CONNECTICUT.

ELEVATOR.

Application led August 24, 1920. Serial No. 405,587.

To all wh-0m it may concern:

Be it known that I, THOMAS C. CRAIG, a citizen of the United States, residing at Waterbury, Connecticut, have invented certain new and useful Improvements in Elevators; and I do hereby declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and vuse'the same.

This invention relates to an elevator, and one designed especially for passenger use, but being adapted also for use as a freight elevator.

A primary object is to provide an elevator car with driving mechanism mounted .directly thereon, said mechanism cooperating with engaging devices mounted in the elevator shaft.

A further object is to provide an electrically driven car, the driving mechanism being of the worm type and of special construction as hereinafter specified.

A still further object is to provide in connection with an electrical controlling device of the usual construction, means for throwing out the trolley elements and app'lying a brake to the driving shaft, in one operation.

With the foregoing and other objects in view, the invention' consists in the novel construction, combination, and arrangement of elements hereinafterfdescribed and claimed.

In the drawings:

Figure 1 is a view showing the elevator car in elevation, and showing that portion of the shaft structure mounting the vertical rack bars.

Figure 2 shows the car in top plan and the shaft structure in transverse section.

Figure 3 is a top plan view of the driving mechanism7 located beneath the fioor ofthe car.

Figure 4 is a section through the gear casing of Figure 3 and transversely of the worm shafts.

Figure 5 is a detail view showing a brake wheel and a shoe thrown into engagement therewith by a cam mountedon' a transverse shaft.

Figure 6 is a diagrammatic view of the devices controlling the motor and effecting connection with the trolley wires.

Figure 7 is a fragmentary view, in elevation, showing another form of drive.

Figure 8 is-a top plan view of the mechanism shown in Figure 7 The shaft structure includes a. plurality i Vertical guides 2O and 21 are mounted on the vertical plate member 14 and cooperate `with a guiding member 22 on each end of the transverse element l. l The driving shaft referred. to below is mounted in bearing blocks which also operate in vertical guides 20 and 21. This structure is duplicated on the opposite side of the shaft, and provision is there made for supporting the trolley wires.

A rack 24 is mounted between the Quiding elements 25 and is suitably spaced from the guides 2O and 21 so that the gear wheels 26 on each end of the driving shaft may mesh with the rack. the radius of the gear wheels being equivalent to the distance between this shaft and the rack 24.

A gear case 29 is suspended beneath the floor of the car and is provided with bear- .ing elements for the several shafts about to be referred to. The mot-or 30 is mounted on the wall of the casing 29 on the car and drives shaft 31 carrying beveled `oinions v32 and 33, the latter driving beveled gear wheels 34 and 35 on worm shafts 36 and 37.

-The drive for'worm shaft 27 is through gear wheel 33. gear wheels 33. 33 carried by the short shaft shown b v dotted lines in Figure 4, and thence through gear wheel 35. The worms 38 and 39 mesh with worm wheels 40 and 41 mounted on the driving shaft 42, and the latter carries agear wheel 26 on each end thereof. The gear wheels just referred to mesh with the racks 24 previously mentioned.. and impart movement to the carin either direction, depending upon the direction of rotation of the motor shaft. The worm gearing acts as a locking device and prevents the descent of the car when the current is cut off from the a brake lever 56.

motor, but independent braking mechanism is also provided.

Depending` from the floor of the car are f two braces 4A, each mounting aboX for therewith, and are mounted on a swinging trolley bracket or the like shown at 50. The bracket 50 is under the-control ofthe brake lever, having connection by means of a link 51 with a crank 52 on shaft 53 rocked by arm 54: which has pivotal connection with a link 55, and the latter hasconnection with This lever 56 also has Aconnection with a. rod 57 pivote'd to a crank 58on a rock shaft 59, the latter having `a cam element 60 'serving to cause the brake fshoe 61 to engage the brake wheel 68. The brake wheel is mounted o-n the driving shaft 42, andthe lever connections just described serve the double purpose of 'throwing the trolley wheels away from the conducting wires and applying the brakes. It is also "apparent that upon the release yof the brake lthe trolley wheels are thrown to operative position. The lever 65 of thev controller 66 serves the'usual purpose, the speed of 'the motor being'g'overned by the controller.

l The propelling means above described is designed especially for use on passenger elevators, anda type of driving lmechanism `for use particularly on freight elevators will now be described.

In Figure 10 an electric motor 100`fdrives lthe shaft 101 carrying a spiral worm 102,

the engaging elements ofwhich are constructed and proportioned to'rnesh with the spiral gear wheels 103, the latter in turn meshing with a large vgear wheel 104C mounted on a sha'ft'105, and the smaller gear wheel being mounted on shaft 106.

The shaft 105 has shoes 105 cooperating with guides 107, and the shaft 106 carries `shoes106 cooperating with guides 108 extending vertically within the elevator shaft.

The rack bars are shown at 109 and 110. In referring' to the `rear wheels and the Ishafts on which theyare mounted it will be. ob- 'servedkth'at there 'are two transverse shafts on each side of the motor and between the latter and the racks,- and that 'each v'shaft carries two ygear wheels, two rack bars being provided for the two large gear wheels 0n the shaft 105.

/Wha-t :is claimed is 1. The -combination with van elevator car `anddriving mechanism mounted thereon,

saidv mechanism including `a 'shaft extending transversely -of the car, va brakev wheel lon and driving lmechanism carried thereby, said mechanism .including an electric motor, a circuit for said motor, al controller connected with said circuit and saidL car, conducting elements adapted to be mounted inthe elevator shaft, ay lswingingly mounted trolley bracket kcarried by thecar, wheels mounted on the bracket and adapted to engage the l conductors when the lbracket is swung to operative position, a. lever and means connected `therewith for controlling' the movement of the bracket, va. brake for the. driving; mechanism and meansfoperatively vconnect-ed with the brake and with the lever effectingl the application of the brake when the lever is thrown to position for `throwing the bracket, and the contact ina-king wheels carried thereby to inoperative position.

3. In combination with anv 'elevator car and driving mechanism carried thereby, said mechanism including'an"electric motor, a circuit 4for said motor, a controller 'connected with said circuit vand said'car, conm;

ducting elements adapted to .bemounted in the elevato-r shaft, a swingingly mounted trolley bracket carried by the carfwheels mounted on-the bracket and adapted to engage the conductors when fthe bracket is 'swung to operative position, a lever, a rod,` having aterrninal crank, a link connected 'at' oneend to' said crank and having its outer end connected to said bracket, a second' link connected at 'one end lto a rod, and -a thirdl link connected with one end vto said lever l,and at its other end to the seco-nd link, whereby said bracket is swung` to operative or inoperative position on movement of said lever; a brake for the drivingmechanism,

saidv brake comprising a brake wheel mounted on a drive shaft', la brake shoe,` to coopera-te with said brake wheel,"and links connecting' said brake shoe and lever, whereby when said bracket is moved to break the circuit of the motor, s'aidbrake will be 'automatica'lly applied.

In testimony whereof I ai'ix my signature in presence of two witnesses.

THOMAS C. CRAIG.A

Witnesses:

IArr'ronio Lnrnnnnii, lADJU'rUs Corn.

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